Another cat question

[Catlady711]

It's not just covered sandboxes.
I have 2 out of 6 boxes that are uncovered (Jack prefers those), and we have several cats that live at the hospital with all uncovered boxes. All of the cats bury things to death and 'wipe' off their paws on the walls or whatever is closest to the sandbox. I've always thought once they start pawing at the walls or edge of the sandbox they were just trying to get the litter out from between the pads of their feet.

[KitCat]

We call that "digging to China!"